C'est disponible pour tout le monde, les versions X86, X64 et ia64, également disponible en pack ISO et via Windows update

Windows Server 2008 Service Pack 2 Beta and Windows Vista Service Pack 2 Beta - Five Language Standalone (KB948465)

Windows Server 2008 Service Pack 2 Beta and Windows Vista Service Pack 2 Beta - Five Language Standalone for x64-based systems (KB948465)

Windows Server 2008 Service Pack 2 Beta - Five Language Standalone for ia64-based systems (KB948465)

Windows Server 2008 Service Pack 2 Beta and Windows Vista Service Pack 2 Beta - Five Language Standalone DVD ISO

Windows Server 2008 Service Pack 2 (SP2) Beta and Windows Vista Service Pack 2 (SP2) Beta is an update to Windows Server and Windows Vista that addresses feedback from our customers.

Windows Server 2008 Service Pack 2 Beta and Windows Vista Service Pack 2 Beta - Windows Update Experience Kit

Windows Server 2008 Service Pack 2 (SP2) Beta and Windows Vista Service Pack 2 (SP2) Beta is available through Windows Update, this kit gives you the instructions and script required to be offered SP2 through Windows Update.

http://blogs.technet.com/longhorn/archive/2008/12/08/service-pack-2-beta-pour-windows-server-2008-et-windows-vista-disponible-pour-tous.aspx